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National Weather Service Marine Forecast FZHW50 PHFO

FZHW50 PHFO 181350
CWFHFO

Coastal Waters Forecast
National Weather Service Honolulu HI
350 AM HST Mon Dec 18 2017

Hawaiian coastal waters within 40 nautical miles including the
Hawaiian Islands Humpback Whale National Marine Sanctuary.

PHZ100-190215-
350 AM HST Mon Dec 18 2017

Synopsis for Hawaiian coastal waters

Weak low pressure over the region will lift north-northeast today
as a cold front approaches. The cold front will reach the Kauai
waters late Tuesday into Tuesday night, then continue down the
island chain through midweek. Another cold front will approach the
islands Thursday through Friday.



PHZ110-190215-
Kauai Northwest Waters-
350 AM HST Mon Dec 18 2017

TODAY
Winds variable less than 10 knots. Wind waves 4 feet.
Northwest swell 5 feet. Scattered showers.

TONIGHT
Winds variable less than 10 knots becoming north
10 knots after midnight. Wind waves 4 feet. North swell 8 feet.
Scattered showers in the evening, then isolated showers after
midnight.

TUESDAY
Northeast winds 15 knots. Wind waves 3 feet. North
swell 9 feet. Isolated showers in the morning, then scattered
showers in the afternoon.

TUESDAY NIGHT
North winds 15 knots. Wind waves 4 feet. North
swell 9 feet. Scattered showers.

WEDNESDAY
North winds 15 knots. Wind waves 4 feet. North swell
9 feet. Scattered showers.

WEDNESDAY NIGHT
North winds 15 knots. Wind waves 4 feet. North
swell 9 feet. Scattered showers.

THURSDAY
North winds 10 knots. Wind waves 3 to 4 feet. North
swell 6 to 8 feet. Scattered showers.

FRIDAY
North winds 10 knots. Wind waves 3 feet. North swell
5 to 7 feet. Scattered showers. 



PHZ111-190215-
Kauai Windward Waters-
350 AM HST Mon Dec 18 2017

TODAY
Winds variable less than 10 knots. Wind waves 4 feet.
Northwest swell 5 feet. Scattered showers in the morning, then
isolated showers in the afternoon.

TONIGHT
Winds variable less than 10 knots. Wind waves 4 feet.
North swell 8 feet. Isolated showers.

TUESDAY
North winds 15 knots. Wind waves 3 feet. North swell
9 feet. Isolated showers in the morning, then scattered showers
in the afternoon.

TUESDAY NIGHT
North winds 15 knots. Wind waves 4 feet. North
swell 9 feet. Scattered showers.

WEDNESDAY
North winds 10 knots. Wind waves 4 feet. North swell
9 feet. Scattered showers.

WEDNESDAY NIGHT
North winds 15 knots. Wind waves 4 feet. North
swell 9 feet. Scattered showers.

THURSDAY
North winds 10 knots. Wind waves 3 to 4 feet. North
swell 6 to 8 feet. Scattered showers.

FRIDAY
North winds 10 knots. Wind waves 3 feet. North swell
5 to 7 feet. Scattered showers. 



PHZ112-190215-
Kauai Leeward Waters-
350 AM HST Mon Dec 18 2017

TODAY
Winds variable less than 10 knots. Wind waves 3 feet.
Northwest swell 5 feet. Isolated showers.

TONIGHT
Winds variable less than 10 knots becoming north
10 knots after midnight. Wind waves 3 feet in the evening then
2 feet or less. Northwest swell 8 feet. Isolated showers.

TUESDAY
Northeast winds 10 knots rising to 20 knots in the
afternoon. Wind waves 2 feet or less. North swell 8 feet.
Isolated showers in the morning, then scattered showers in the
afternoon.

TUESDAY NIGHT
Northeast winds 15 knots. Wind waves 2 feet or
less then 4 feet after midnight. North swell 8 feet. Scattered
showers.

WEDNESDAY
North winds 15 knots. Wind waves 4 feet. North swell
9 feet. Scattered showers.

WEDNESDAY NIGHT
North winds 15 knots. Wind waves 4 feet. North
swell 8 feet. Scattered showers.

THURSDAY
North winds 10 knots. Wind waves 3 to 4 feet. North
swell 6 to 8 feet. Scattered showers.

FRIDAY
North winds 10 knots. Wind waves 2 feet or less. North
swell 5 to 6 feet. Scattered showers. 



PHZ113-190215-
Kauai Channel-
350 AM HST Mon Dec 18 2017

TODAY
Winds variable less than 10 knots. Wind waves 4 feet.
Northwest swell 5 feet. Isolated showers through the day.

TONIGHT
Winds variable less than 10 knots becoming northeast
10 knots after midnight. Wind waves 4 feet. Northwest swell
7 feet. Scattered showers.

TUESDAY
Northeast winds 10 knots. Wind waves 3 feet. North
swell 8 feet. Scattered showers.

TUESDAY NIGHT
Northeast winds 15 knots. Wind waves 4 feet.
North swell 8 feet. Scattered showers.

WEDNESDAY
North winds 15 knots. Wind waves 4 feet. North swell
9 feet. Scattered showers and slight chance of thunderstorms.

WEDNESDAY NIGHT
North winds 15 knots. Wind waves 4 feet. North
swell 9 feet. Scattered showers.

THURSDAY
North winds 10 knots. Wind waves 3 to 4 feet. North
swell 6 to 8 feet. Isolated showers.

FRIDAY
North winds 10 knots. Wind waves 2 feet or less. North
swell 5 to 6 feet. Scattered showers. 



PHZ114-190215-
Oahu Windward Waters-
350 AM HST Mon Dec 18 2017

TODAY
Winds variable less than 10 knots. Wind waves 4 feet.
Northwest swell 5 feet. Isolated showers in the afternoon.

TONIGHT
Winds variable less than 10 knots. Wind waves 4 feet.
Northwest swell 7 feet. Scattered heavy showers and thunderstorms
in the evening, then heavy showers and thunderstorms likely after
midnight.

TUESDAY
North winds 10 knots. Wind waves 4 feet. North swell
8 feet. Thunderstorms likely in the morning. Scattered heavy
showers through the day.

TUESDAY NIGHT
North winds 15 knots. Wind waves 4 feet. North
swell 9 feet. Scattered showers.

WEDNESDAY
North winds 10 knots. Wind waves 4 feet. North swell
9 feet. Scattered showers and slight chance of thunderstorms.

WEDNESDAY NIGHT
North winds 15 knots. Wind waves 4 feet. North
swell 9 feet. Scattered showers.

THURSDAY
North winds 10 knots. Wind waves 3 to 4 feet. North
swell 6 to 8 feet. Scattered showers.

FRIDAY
North winds 10 knots. Wind waves 3 feet. Northwest
swell 5 to 6 feet. Scattered showers. 



PHZ115-190215-
Oahu Leeward Waters-
350 AM HST Mon Dec 18 2017

TODAY
Winds variable less than 10 knots. Wind waves 3 feet.
Northwest swell 4 feet. Isolated showers in the morning, then
scattered showers and thunderstorms in the afternoon.

TONIGHT
Winds variable less than 10 knots becoming northeast
10 knots after midnight. Wind waves 3 feet in the evening then
2 feet or less. Northwest swell 6 feet. Heavy showers and
thunderstorms likely.

TUESDAY
Winds variable less than 10 knots becoming northeast
10 knots in the afternoon. Wind waves 2 feet or less. Northwest
swell 8 feet. Heavy showers and thunderstorms likely in the
morning, then scattered showers in the afternoon.

TUESDAY NIGHT
Northeast winds 10 knots. Wind waves 2 feet or
less then 3 feet after midnight. North swell 8 feet. Scattered
showers.

WEDNESDAY
North winds 15 knots. Wind waves 3 feet. North swell
8 feet. Scattered showers and slight chance of thunderstorms.

WEDNESDAY NIGHT
North winds 15 knots. Wind waves 3 feet. North
swell 8 feet. Scattered showers.

THURSDAY
North winds 10 knots. Wind waves 3 feet. North swell
6 to 8 feet. Isolated showers.

FRIDAY
North winds 10 knots. Wind waves 2 feet or less.
Northwest swell 5 to 6 feet. Scattered showers. 



PHZ116-190215-
Kaiwi Channel-
350 AM HST Mon Dec 18 2017

TODAY
Winds variable less than 10 knots. Wind waves 4 feet.
Northwest swell 5 feet. Isolated showers through the day.

TONIGHT
North winds 10 knots. Wind waves 4 feet. Northwest
swell 6 feet. Scattered heavy showers and thunderstorms in the
evening, then heavy showers and thunderstorms likely after
midnight.

TUESDAY
Winds variable less than 10 knots becoming north
10 knots in the afternoon. Wind waves 4 feet. North swell 8 feet.
Heavy showers likely in the morning. Thunderstorms likely through
the day. Scattered showers in the afternoon.

TUESDAY NIGHT
Northeast winds 10 knots. Wind waves 4 feet.
North swell 8 feet. Showers likely and slight chance of
thunderstorms.

WEDNESDAY
North winds 15 knots. Wind waves 4 feet. North swell
9 feet. Showers likely and slight chance of thunderstorms.

WEDNESDAY NIGHT
North winds 15 knots. Wind waves 3 feet. North
swell 9 feet. Scattered showers and slight chance of
thunderstorms.

THURSDAY
North winds 15 knots. Wind waves 3 feet. North swell
6 to 8 feet. Scattered showers.

FRIDAY
North winds 10 knots becoming variable less than
10 knots, then becoming north 10 knots after midnight. Wind waves
3 feet. North swell 5 to 6 feet. Isolated showers. 



PHZ117-190215-
Maui County Windward Waters-
350 AM HST Mon Dec 18 2017

TODAY
East winds 10 knots. Wind waves 4 feet. Northwest swell
5 feet. Haze through the day. Scattered showers in the morning.
Isolated showers in the afternoon.

TONIGHT
Winds variable less than 10 knots becoming north
10 knots after midnight. Wind waves 4 feet. Northwest swell
6 feet. Haze through the night. Scattered heavy showers and
thunderstorms in the evening. Heavy showers and thunderstorms
likely after midnight.

TUESDAY
Winds variable less than 10 knots becoming northwest
10 knots in the afternoon. Wind waves 4 feet. North swell 8 feet.
Haze. Occasional heavy showers and thunderstorms.

TUESDAY NIGHT
North winds 10 knots. Wind waves 4 feet. North
swell 8 feet. Heavy showers likely and slight chance of
thunderstorms.

WEDNESDAY
North winds 10 knots. Wind waves 4 feet. North swell
9 feet. Heavy showers likely and slight chance of thunderstorms.

WEDNESDAY NIGHT
North winds 10 knots. Wind waves 3 feet. North
swell 9 feet. Heavy showers likely and slight chance of
thunderstorms.

THURSDAY
North winds 10 knots. Wind waves 3 feet. North swell
7 to 9 feet. Scattered showers.

FRIDAY
North winds 10 knots becoming variable less than
10 knots, then becoming north 10 knots after midnight. Wind waves
3 feet. Northwest swell 5 to 6 feet. Scattered showers. 



PHZ118-190215-
Maui County Leeward Waters-
350 AM HST Mon Dec 18 2017

TODAY
Northeast winds 10 knots. Wind waves 3 feet. Northwest
swell 4 feet. Scattered showers through the day. Scattered
thunderstorms in the afternoon.

TONIGHT
Winds variable less than 10 knots becoming north
10 knots after midnight. Wind waves 3 feet. Northwest swell
4 feet. Scattered heavy showers and thunderstorms in the evening,
then heavy showers and thunderstorms likely after midnight.

TUESDAY
Winds variable less than 10 knots. Wind waves 3 feet.
Northwest swell 6 feet. Haze through the day. Occasional heavy
showers and thunderstorms in the morning. Heavy showers and
thunderstorms likely in the afternoon.

TUESDAY NIGHT
Northeast winds 10 knots. Wind waves 2 feet or
less. North swell 7 feet. Haze. Heavy showers likely and slight
chance of thunderstorms.

WEDNESDAY
North winds 15 knots. Wind waves 3 feet. North swell
7 feet. Heavy showers likely and slight chance of thunderstorms.

WEDNESDAY NIGHT
North winds 15 knots. Wind waves 3 feet. North
swell 8 feet. Scattered heavy showers and slight chance of
thunderstorms.

THURSDAY
North winds 15 knots. Wind waves 3 feet. North swell
5 to 7 feet. Isolated showers.

FRIDAY
North winds 10 knots. Wind waves 2 feet or less. North
swell 4 to 5 feet. Isolated showers. 



PHZ119-190215-
Maalaea Bay-
350 AM HST Mon Dec 18 2017

TODAY
Winds variable less than 10 knots. Wind waves 2 feet or
less. Scattered showers.

TONIGHT
Winds variable less than 10 knots. Wind waves 2 feet
or less. Haze through the night. Scattered heavy showers and
thunderstorms in the evening. Heavy showers and thunderstorms
likely after midnight.

TUESDAY
Winds variable less than 10 knots. Wind waves 2 feet
or less. Haze. Occasional heavy showers and thunderstorms.

TUESDAY NIGHT
Winds variable less than 10 knots. Wind waves
2 feet or less. Heavy showers likely and slight chance of
thunderstorms.

WEDNESDAY
Winds variable less than 10 knots. Wind waves 2 feet
or less. Heavy showers likely and slight chance of thunderstorms.

WEDNESDAY NIGHT
Winds variable less than 10 knots becoming
north 10 knots after midnight. Wind waves 2 feet or less. Heavy
showers likely and slight chance of thunderstorms.

THURSDAY
North winds 10 knots. Wind waves 2 feet or less.
Scattered showers.

FRIDAY
Winds variable less than 10 knots. Wind waves 2 feet or
less. Isolated showers. 



PHZ120-190215-
Pailolo Channel-
350 AM HST Mon Dec 18 2017

TODAY
Northeast winds 10 knots. Wind waves 4 feet. Northwest
swell 4 feet. Isolated showers in the morning, then scattered
showers in the afternoon.

TONIGHT
Winds variable less than 10 knots. Wind waves 4 feet.
Northwest swell 4 feet. Haze through the night. Scattered heavy
showers and thunderstorms in the evening. Heavy showers and
thunderstorms likely after midnight.

TUESDAY
Winds variable less than 10 knots. Wind waves 3 feet.
North swell 6 feet. Occasional heavy showers and thunderstorms in
the morning, then heavy showers and thunderstorms likely in the
afternoon.

TUESDAY NIGHT
Winds variable less than 10 knots. Wind waves
3 feet. North swell 7 feet. Heavy showers likely and slight
chance of thunderstorms.

WEDNESDAY
North winds 10 knots. Wind waves 3 feet. North swell
8 feet. Heavy showers likely and slight chance of thunderstorms.

WEDNESDAY NIGHT
North winds 10 knots. Wind waves 3 feet. North
swell 9 feet. Scattered heavy showers and slight chance of
thunderstorms.

THURSDAY
North winds 10 knots. Wind waves 3 feet. North swell
6 to 8 feet. Scattered showers.

FRIDAY
North winds 10 knots becoming variable less than
10 knots, then becoming north 10 knots after midnight. Wind waves
2 feet or less. North swell 4 to 6 feet. Isolated showers. 



PHZ121-190215-
Alenuihaha Channel-
350 AM HST Mon Dec 18 2017

TODAY
East winds 10 knots. Wind waves 4 feet. Northwest swell
5 feet. Haze through the day. Scattered showers through the day.
Scattered thunderstorms in the afternoon.

TONIGHT
Winds variable less than 10 knots. Wind waves 4 feet.
Northwest swell 5 feet. Haze through the night. Scattered heavy
showers and thunderstorms in the evening. Heavy showers and
thunderstorms likely after midnight.

TUESDAY
Winds variable less than 10 knots. Wind waves 4 feet.
Northwest swell 7 feet. Haze. Occasional heavy showers and
thunderstorms.

TUESDAY NIGHT
Winds variable less than 10 knots. Wind waves
3 feet. Northwest swell 8 feet. Haze. Heavy showers likely and
slight chance of thunderstorms.

WEDNESDAY
Winds variable less than 10 knots. Wind waves
3 feet. North swell 8 feet. Heavy showers likely and slight
chance of thunderstorms.

WEDNESDAY NIGHT
North winds 10 knots. Wind waves 3 feet. North
swell 9 feet. Heavy showers likely and slight chance of
thunderstorms.

THURSDAY
North winds 10 knots. Wind waves 3 feet. North swell
6 to 8 feet. Scattered showers.

FRIDAY
North winds 10 knots. Wind waves 3 feet. Northwest
swell 5 to 6 feet. Isolated showers. 



PHZ122-190215-
Big Island Windward Waters-
350 AM HST Mon Dec 18 2017

TODAY
Southeast winds 10 knots. Wind waves 4 feet. Northwest
swell 5 feet. Haze through the day. Isolated showers in the
morning. Scattered showers in the afternoon.

TONIGHT
Southeast winds 10 knots. Wind waves 4 feet. Northwest
swell 5 feet. Haze. Scattered heavy showers and thunderstorms.

TUESDAY
Winds variable less than 10 knots. Wind waves 4 feet.
Northwest swell 7 feet. Haze through the day. Heavy showers and
thunderstorms likely in the morning. Occasional heavy showers and
thunderstorms in the afternoon.

TUESDAY NIGHT
Winds variable less than 10 knots. Wind waves
4 feet. North swell 8 feet. Haze. Heavy showers likely and slight
chance of thunderstorms.

WEDNESDAY
Southeast winds 10 knots in the morning becoming
variable less than 10 knots. Wind waves 3 feet. North swell
8 feet. Haze. Heavy showers likely and slight chance of
thunderstorms.

WEDNESDAY NIGHT
Northwest winds 10 knots. Wind waves 4 feet.
North swell 9 feet. Haze. Heavy showers likely and slight chance
of thunderstorms.

THURSDAY
North winds 15 knots. Wind waves 4 feet. North swell
6 to 8 feet. Scattered showers.

FRIDAY
North winds 10 knots. Wind waves 3 feet. Northwest
swell 5 to 6 feet. Isolated showers. 



PHZ123-190215-
Big Island Leeward Waters-
350 AM HST Mon Dec 18 2017

TODAY
Winds variable less than 10 knots west of the Big
Island...east 15 knots near South Point. Wind waves 5 feet.
Northwest swell 4 feet. Haze through the day. Scattered showers
through the day. Scattered thunderstorms in the afternoon.

TONIGHT
North winds 10 knots. Wind waves 5 feet. Northwest
swell 4 feet. Haze. Scattered heavy showers and thunderstorms.

TUESDAY
Northeast winds 10 knots in the morning becoming
variable less than 10 knots. Wind waves 4 feet. Northwest swell
4 feet. Haze. Occasional heavy showers and thunderstorms.

TUESDAY NIGHT
Winds variable less than 10 knots. Wind waves
4 feet. Northwest swell 4 feet. Haze. Heavy showers likely and
slight chance of thunderstorms.

WEDNESDAY
Winds variable less than 10 knots. Wind waves
3 feet. North swell 4 feet. Haze. Heavy showers likely and slight
chance of thunderstorms.

WEDNESDAY NIGHT
Winds variable less than 10 knots becoming
north 10 knots after midnight. Wind waves 3 feet. North swell
5 feet. Heavy showers likely and slight chance of thunderstorms.

THURSDAY
North winds 10 knots. Wind waves 3 feet. North swell
4 to 5 feet. Haze. Scattered showers.

FRIDAY
North winds 10 knots in the morning becoming variable
less than 10 knots, then becoming north 10 knots after midnight.
Wind waves 3 feet. Northwest swell 3 to 4 feet. Haze.



PHZ124-190215-
Big Island Southeast Waters-
350 AM HST Mon Dec 18 2017

TODAY
East winds 15 knots. Wind waves 5 feet. Northwest swell
4 feet. Scattered showers.

TONIGHT
East winds 10 knots. Wind waves 5 feet. Northwest
swell 4 feet. Scattered heavy showers and thunderstorms.

TUESDAY
Winds variable less than 10 knots. Wind waves 4 feet.
Northwest swell 4 feet. Heavy showers and thunderstorms likely.

TUESDAY NIGHT
Northeast winds 10 knots in the evening becoming
variable less than 10 knots. Wind waves 4 feet. Northwest swell
6 feet. Haze. Heavy showers likely and slight chance of
thunderstorms.

WEDNESDAY
Southeast winds 10 knots veering southwest in the
afternoon. Wind waves 4 feet. Northwest swell 7 feet. Haze. Heavy
showers likely and slight chance of thunderstorms.

WEDNESDAY NIGHT
Northwest winds 10 knots. Wind waves 4 feet.
North swell 8 feet. Haze. Heavy showers likely and slight chance
of thunderstorms.

THURSDAY
North winds 15 knots. Wind waves 4 feet. North swell
6 to 8 feet. Haze. Scattered showers.

FRIDAY
Northeast winds 10 knots. Wind waves 3 feet. Northwest
swell 4 to 6 feet. Haze. Isolated showers.